import os 

def changeName(path, name):
    i = 1
    for filename in os.listdir(path):
        print(path+filename, '=>', path+str(name)+'_'+str(i)+'.jpg')
        os.rename(path+filename, path+str(name)+'_'+str(i)+'.jpg')
        i += 1
        
changeName('C:/Users/nokh9/Desktop/dog_sound_mel/barking/', 'barking')
#changeName('C:/Users/nokh9/Desktop/dog_sound_mel/lonely/', 'howling')
#changeName('C:/Users/nokh9/Desktop/dog_sound_mel/sad/', 'whimpering')